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Snowshoes's picture
Submitted By: Snowshoes
Joined: Oct 17 2005
Posts:
4 thirds
Posted: July 2, 2008 - 2:50pm

Can som?eone give me a very simple explanation of what 4 thirds is and what it means

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SDB777's picture
Submitted By: SDB777
Location: Cabot, Arkansas USA
Joined: Jun 29 2008
Posts:
#1
Re: 4 thirds
Posted: July 2, 2008 - 6:59pm

I can actually answer this question!

Refers to a standard screen. 4:3 is the ratio of width to height of the screen on a regular TV set and most computer monitors.

The there is the 16:9 ratio, but.....

Scott (feeling great now) B

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Clay2's picture
Submitted By: Clay2
Location: Minden Hills, Ontario, Canada
Joined: Dec 13 2006
Posts:
#2
Re: 4 thirds
Posted: July 3, 2008 - 4:29pm

4/3 is also the crop factor used by Olympus for their
digital camera DX-size sensors. Canon is x1.6, Nikon is x1.5 , and Olympus is 4/3 which = x1.3 crop. Hope this
helps.

/Clay

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Clay2's picture
Submitted By: Clay2
Location: Minden Hills, Ontario, Canada
Joined: Dec 13 2006
Posts:
#3
Re: 4 thirds
Posted: July 4, 2008 - 11:42am

Found this link with diagrams for sensor-sizes:

http://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm

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Clay2's picture
Submitted By: Clay2
Location: Minden Hills, Ontario, Canada
Joined: Dec 13 2006
Posts:
#4
Re: 4 thirds
Posted: July 4, 2008 - 11:48am

Ooops,
something wrong with my math: The 4/3 sensor
size is a x2 crop factor.

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